Question
24.5g KClO3 heated to give O2, which is allowed to react completely with H2 to form H2O. This H2 comes from Zn and H2SO4 reaction. The amount of Zn required for the purpose is
Joshi sir comment
2KClO3 ----------------------> 2KCl + 3O2
3O2 + 6H2 --------------------> 6H2O
6Zn + 6H2SO4 -------------------> 6ZnSO4 + 6H2
so 2 mole KClO3 ----------------------------- 6 mole Zn
now solve